BIOL 1202 Chapter : Chapter 23 Notes
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Chapter 23: the evolutions of populations the smallest unit of evolution: one common misconception about evolution is that individual organisms evolve during their lifetime, evolutionary processes (e. g. , natural selection) acts on individuals, but populations evolve. In sexually reproducing organisms, sexual recombination produces most of the variability produces most of the variability in each generation: crossing over in prophase i. Variation within a population: discrete characters: classified on an either-or basis, e. g. , flower color in pea plants, quantitative characters: vary along a continuum within a population, e. g. , height and weight. Concept 23. 2 the hardy-weinberg equation: can be used to test whether a population is evolving. Figure 23. 6: population- a group of individuals of the same species living in a certain defined area. Hardy-weinberg equation: h-w equilibrium: describes a population that is not evolving (i. e. , allele frequencies don"t change, 5 assumptions being h-w equilibrium: ; q=: q=0. 01, p+q=1, p= 1-q, p=0. 99.
